JPH0772966A - Graphic input device - Google Patents

Abstract

PURPOSE:To automatically correct the deviation of coordinate during usual use, and to attain input reduced in its error by correcting the output of a coordinate detecting sensor on the basis of a coordinate value at the time of detecting that a pen has passed on a correction line. CONSTITUTION:A sensor 1 for X coordinate correction and a sensor 2 for Y coordinate correction which detect that the pen has passed on the correction lines for X coordinate correction and Y coordinate correction perpendicular respectively to an X axis and a Y axis are provided in addition to a sensor 3 for coordinate detection to detect the coordinate with the pen is indicating. Then, when these sensors 1, 2 detect that the pen has passed on the correction lines, the latest values of the coordinates the sensor 3 for coordinate detection outputs are held, and a coordinate correcting device 5 corrects and outputs the output of the sensor 3 for coordinate detection by using the data of a correction data holding device 4. Thus, the deviation of the coordinate is corrected without the intermediary of the correcting operation of a user during the usual use by the user, and the input reduced in its error can be attained always.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pen-based handwritten figure input device, and more particularly to a figure input device provided with a coordinate correction device.

[0002]

2. Description of the Related Art In recent years, a figure input device using a pen has been widely used for inputting figures and characters to a computer. The method of inputting figures and characters with a pen provides a great advantage to the user because no special training is required. An example of a conventional figure input device will be described below with reference to FIG. In FIG. 7, reference numeral 31 is a coordinate detection sensor for detecting the coordinates designated by the pen. Reference numeral 33 is a coordinate correction device that corrects the coordinates of the output from the coordinate detection sensor 31 based on the correction data held by the correction data holding device 32. Reference numeral 34 denotes a coordinate correction instructing device that notifies the user that the coordinates will be corrected and instructs the user to input specific coordinates with a pen. When the user inputs the specific coordinates instructed by the coordinate correction instructing device 34, Correction data holding device 3
2 holds.

The operation of the conventional figure input device configured as described above will be described below. When the user inputs with the pen, X is detected by the coordinate detection sensor 31.
Coordinates in the axis and Y-axis directions are obtained. However, since the output data of the coordinate detection sensor 31 changes due to changes in the external environment and materials, the coordinate correction instructing device 34 instructs the user to input specific coordinates with several pens. The coordinates obtained by the coordinate detection sensor 31 at that time are held in the correction data holding device 32. The coordinate correction device 33 calculates the rate of change of the coordinate value and the parallel movement amount based on the data held by the correction data holding device 32, and corrects the coordinate to obtain and output the correct coordinate value. .

[0004]

However, in the above-mentioned structure, it is necessary to request the user to perform an operation for position correction every time the position correction is required, and the operation is also required to be accurate. There was a problem such as being. In view of the above conventional problems, it is an object of the present invention to provide a figure input device that corrects a coordinate shift during normal use by a user and can always perform input with a small error.

[0005]

In order to achieve the above object, the invention according to claim 1 is a coordinate detecting sensor for detecting the coordinate of an arbitrary point pointed by a pen, and a plurality of sensors for detecting a coordinate perpendicular to the X axis. An X-coordinate correction sensor that detects that the pen has passed on the correction straight line, a Y-coordinate correction sensor that detects that the pen has passed on a plurality of correction straight lines that are perpendicular to the Y-axis, and an X-coordinate correction sensor. And correction data holding means for holding the output of the coordinate detection sensor when the pen passes on the correction straight line of the Y-axis correction sensor, and for coordinate detection based on the correction data held by the correction data holding means. It is characterized in that it is provided with coordinate correction means for correcting the output of the sensor.

Further, in the invention described in claim 2, the coordinate detecting sensor for detecting the coordinates of an arbitrary point pointed by the pen, and the input surface is divided into four areas vertically and horizontally to be divided into four areas. In two diagonally located areas, it is detected that the pen has passed on a plurality of correction straight lines perpendicular to the X axis, and in the remaining two areas, the pen has passed a plurality of correction straight lines perpendicular to the Y axis. A coordinate correction sensor for detecting that the correction is performed, correction data holding means for holding the output of the coordinate detection sensor when the pen passes on the correction straight line of the coordinate correction sensor, and correction data holding means. The present invention is characterized by comprising coordinate correction means for correcting the output of the coordinate detection sensor based on the correction data.

[0007]

According to the first aspect of the present invention, the sensor for X-coordinate correction detects that the pen has crossed the correction straight line perpendicular to the X-axis while the user is in normal use. The X-coordinate value obtained by the coordinate detection sensor is held in the correction data holding device, the Y-coordinate value is held in the correction data holding device in the same manner, and the coordinate correction device detects the coordinate based on the data. Since the output of the sensor is corrected, it is possible to correct the coordinate shift without any correction operation by the user and always input with a small error.

According to the second aspect of the present invention, the sensor for coordinate correction detects that the pen has crossed the correction straight line for the X coordinate and the Y coordinate, and if the pen passes the correction straight line for the X coordinate at that time. The X-coordinate value obtained by the coordinate detection sensor is held in the correction data holding device, and if it is the Y-correction straight line, the Y-coordinate value is held in the correction data holding device, and the coordinate correction is performed based on those data. Since the output of the coordinate detection sensor is corrected by the device, it is possible to correct the coordinate shift without any correction operation by the user and always input with a small error. Furthermore, the correction sensors are combined into one. The number of elements can be reduced.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A graphic input device according to an embodiment of the present invention will be described below with reference to FIGS. Figure 1
In the figure, 1 is an X coordinate correction sensor that detects that the pen has passed on a correction straight line for X coordinate correction that is perpendicular to the X axis.
Reference numeral 2 denotes a Y coordinate correction sensor that detects that the pen has passed on a correction straight line for Y coordinate correction that is perpendicular to the Y axis. Reference numeral 3 is a coordinate detection sensor for detecting the coordinates designated by the pen. Reference numeral 5 denotes a coordinate correction device that corrects the output of the coordinate detection sensor 3 with the correction data held by the correction data holding device 4. When the correction data holding device 4 detects that the pen has passed these correction straight lines by the X coordinate correction sensor 1 and the Y coordinate correction sensor 2,
The detected coordinate value of the coordinate detection sensor 3 at that time is held.

2 and 3 show the structures of the X coordinate correction sensor 1 and the Y coordinate correction sensor 2. In FIG.
Reference numerals 6a and 6b denote conductors stretched at positions of correction straight lines parallel to the X axis or Y axis, 7 denotes a conductive film located below the conductors 6a and 6b, and 8 denotes an electrode connected to one side of the conductive film 7. . Further, in FIG. 3, reference numerals 9 and 10 denote protective films arranged so as to face each other, and the conductors 6 a are provided on the lower surface of the protective film 9.
6b is provided, and the conductive film 7 and the electrode 8 are provided on the upper surface of the protective film 10. These protective films 9, 1
A spacer 11 is interposed between 0s to prevent the conductive wires 6a and 6b from coming into contact with the conductive film 7 when there is no input by the pen.

The operation of the graphic input device having the above configuration will be described below. FIG. 4 shows a state in which the user is inputting with the figure input device. Correction line 1 in FIG.
2a and 12b are the positions where the conducting wires 6a and 6b are stretched in FIG. 2, respectively. Reference numeral 13 is a locus of input by the user's pen, and 14a and 14b are correction straight lines 1 respectively.
It is the intersection with 2a and 12b.

When the user makes an input as shown by the locus 13, first, the conductive wire 6a and the conductive film 7 in FIG. 3 come into contact with each other at the intersection 14a. At this time, if a voltage is applied between the conductive wire 6a and the conductive film 7, it is possible to detect that the pen has crossed the correction straight line 12a due to the current flowing. Similarly, it can be detected when passing through the intersection 14b. As described above, the X-coordinate correction sensor 1 and the Y-coordinate correction sensor 2 detect that the pen 13 has passed on the correction straight lines 12a and 12b, and notify the correction data holding device 4. At that time, the correction data holding device 4 holds the output of the coordinate detection sensor 3. In the coordinate correction device 5, the output of the coordinate detection sensor 3 is corrected by the data of the correction data holding device 4,
Output.

The correction of coordinates will be described with reference to the case shown in FIG. Regarding the Y-coordinate, the correction data holding device 4 holds the latest Y-coordinate value output by the coordinate detection sensor 3 when the pen 13 passes through the intersection 14a and the intersection 14b, and the coordinate correction device 5 outputs the 2nd value. The difference between the two coordinate values,
The change rate of the coordinate value output from the coordinate detection sensor 3 is obtained from the difference between the Y coordinates of the correction straight lines 12a and 12b depending on the physical position, and the Y coordinate of the correction straight line 12a and the Y of the intersection 14a are obtained.
Find the amount of parallel movement so that the coordinates match. Then, the coordinate value output from the coordinate detecting sensor 3 is corrected based on the rate of change and the amount of parallel movement. The same correction is performed for the X coordinate.

In this embodiment, the correction straight lines 12a, 12
Although the number of each b is two, the same applies to the case of three or more. Next, a graphic input device according to another embodiment of the present invention will be described with reference to FIGS.
In FIG. 5, reference numeral 21 is a coordinate correction sensor that detects that the pen has passed on a correction straight line for coordinate correction, and 22 is a coordinate detection sensor that detects the coordinates designated by the pen. A coordinate correction device 24 corrects the coordinates based on the correction data held by the correction data holding device 23 based on the output from the coordinate detection sensor 22. Correction data holding device 2
The coordinate detecting sensor 21 detects that the pen has passed the correction straight line by the coordinate correcting sensor 21 and detects the coordinate detecting sensor 2 at that time.
Holds the output coordinate value of 2. FIG. 6 shows correction lines 25a to 25d and 26a to 26 in the coordinate correction sensor 21.
The arrangement | positioning state of d is shown. In FIG. 6, the input surface is divided into four areas vertically and horizontally to be divided into four areas. In two areas diagonally located, a plurality of correction straight lines 25a to 25d parallel to the X-axis are arranged and left. In the two regions, a plurality of correction straight lines 26a to 26d parallel to the Y axis are arranged.

The operation of the graphic input device having the above configuration will be described below. When the user sequentially passes through the correction straight lines 25a and 25b while inputting a figure with the pen, the coordinates at each passing point are obtained by the coordinate detection sensor 22 and held by the correction data holding device 23. In the coordinate correction device 24, the rate of change of the Y coordinate and the parallel movement amount are obtained based on the value of the Y coordinate on the correction straight lines 25a and 25b and the output coordinate value of the coordinate detection sensor 22, and the coordinate detection sensor 22 outputs it. Correct the coordinate values. The same correction is performed for the X coordinate.

In this embodiment, the correction straight lines are 4
The time of the book is shown, but the same applies to the case of two, three, five or more.

[0017]

As described above, according to the invention of claim 1, the fact that the pen has crossed the correction straight line is detected by the X, Y coordinate correction sensor, and the coordinate value of the coordinate detection sensor at that time is detected. It is held in the correction data holding device, and the output of the coordinate detection sensor is corrected based on the data stored in the coordinate correction device. Automatically and accurately, it has a great practical effect.

According to the invention of claim 2, since the effect obtained by the invention of claim 1 can be obtained by providing only one coordinate correcting sensor, the cost increase by providing the correcting sensor can be reduced. Moreover, when combined with a liquid crystal display, it is possible to suppress a decrease in light transmittance, and it is possible to make the whole thin, which is a great practical effect.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a main part of a figure input device according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a structure of an X-coordinate correction sensor or a Y-coordinate correction sensor of the same embodiment.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is an explanatory diagram showing a state in which a figure is being input in the embodiment.

FIG. 5 is a configuration diagram of a main part of a figure input device according to another embodiment of the present invention.

FIG. 6 is an explanatory view of the arrangement of correction straight lines of the coordinate correction sensor in the embodiment.

FIG. 7 is a configuration diagram of a conventional graphic input device.

[Explanation of symbols]

 1 X coordinate correction sensor 2 Y coordinate correction sensor 3 Coordinate detection sensor 4 Correction data holding device 5 Coordinate correction device 12a Correction straight line 12b Correction straight line 21 Coordinate correction sensor 22 Coordinate detection sensor 23 Correction data holding device 24 Coordinate correction Device 25a Correction straight line 25b Correction straight line 25c Correction straight line 25d Correction straight line 26a Correction straight line 26b Correction straight line 26c Correction straight line 26d Correction straight line

Claims (2)

[Claims] 1. A coordinate detection sensor for detecting coordinates of an arbitrary point designated by a pen, an X coordinate correction sensor for detecting passage of a pen on a plurality of correction straight lines perpendicular to the X axis, and a Y coordinate correction sensor. A Y-coordinate correction sensor that detects that the pen has passed on a plurality of correction straight lines that are perpendicular to the axis, and coordinate detection when the pen passes on the correction straight lines of the X-coordinate correction sensor and the Y-axis correction sensor A graphic input comprising a correction data holding means for holding the output of the sensor and a coordinate correction means for correcting the output of the coordinate detection sensor based on the correction data held by the correction data holding means. apparatus. 2. A coordinate detecting sensor for detecting the coordinates of an arbitrary point pointed by a pen, and an input surface divided into four areas vertically and horizontally into four areas, and in two areas diagonally located among them. Is a coordinate correction sensor that detects that the pen has passed on a plurality of correction straight lines that are perpendicular to the X axis, and that the pen has passed on a plurality of correction straight lines that are perpendicular to the Y axis in the remaining two regions. And correction data holding means for holding the output of the coordinate detection sensor when the pen passes on the correction straight line of the coordinate correction sensor, and for the coordinate detection based on the correction data held by the correction data holding means. A graphic input device comprising coordinate correction means for correcting the output of a sensor.